COREN Mechanical case studies
COREN Mechanical · Put your knowledge to work in context.
The COREN Professional Examination is the assessment route through which the Council for the Regulation of Engineering in Nigeria (COREN) evaluates engineering graduates and practitioners seeking registration and licence to practise engineering in Nigeria. COREN describes itself as a statutory body set up by the Federal Government with the mandate to regulate the practice of engineering "in all aspects and ramifications"; it was established by Decree 55 of 1970, amended by Decree 27 of 1992, and now operates under the Engineers (Registration, etc.) Act CAP E11, 2004, further amended by Act No 3 of 2018. The COREN Mechanical case studies are 5 cases and about 4,471 words.
1Derating a 10 barg Air Receiver Found Thinned by UT
A 20-year-old vertical air receiver at a bottling plant has a shell and heads of SA-516 Gr 70, inside diameter 1200 mm, original shell thickness 8.0 mm, design 10 barg at 60 °C, full radiography (E = 1.0) and a corrosion allowance of 1.5 mm. The compressor is rated 5.5 m³/min FAD with a cut-out pressure of 9.5 barg.
958 words, about 5 min2Cooling-Water Pump Cavitation After a Debottleneck Request
A cooling-water pump takes suction from an open concrete sump whose normal water level is 2.5 m below the pump centreline. Duty is 240 m³/h at 45 m head; the pump curve shows NPSHr of 5.0 m at duty and 6.2 m at 280 m³/h.
842 words, about 4 min3Headshaft Hub Fretting on a 75 kW Conveyor Drive
A primary crushed-stone conveyor is driven through a 25:1 helical gearbox by a 75 kW, 1480 r/min motor. Headshaft speed is about 59 r/min, giving roughly 12.1 kN·m at the shaft.
815 words, about 4 min4Wire Rope Rejection and Production Pressure on a 10 t Foundry Crane
During a statutory inspection of a 10 t, M5 duty overhead travelling crane in a foundry you record the following. The hoist rope is 6 × 36 IWRC, 16 mm nominal, installed 8 years ago.
908 words, about 5 min5Pneumatic versus Hydrostatic Proof Test on a Fuel-Gas Line
A 220 m long fuel-gas line to a furnace, 150 mm nominal bore (internal diameter about 152 mm), is complete and must be proved before commissioning. Design pressure is 12 barg.
948 words, about 5 min